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Mathematics: Area of squares, rectangles and triangles


In this module, you can study how to find the area of squares, rectangles and triangles; and the differences between perimeter and area.


The video does a good job of explaining the meanings of both area and perimeter and the differences between the two. However, there are two mistakes in the video. See if you can spot them! (If not, read the description of this video on the "Area of squares, rectangles and triangles" page.)


The above video contains a very clear explanation about how to find the area of triangles.

Did you know?

Formula for area of a rectangle:  b x h (base x height)


Formula for area of a triangle:   x b x h


While perimeter is measured in units of length, area is measured in units squared.

Objects with the same perimeter can have different areas.

Area does NOT equal length plus width.

Study and practice

Check your understanding


The video explains how to use basic calculator functions and provides examples.


0.00 min      addition (+), subtraction (-), multiply (x), divide (÷)

1.19 min      decimal point
2.43 min      C, CE and backspace
4.19 min      square, square root & fractions
6.17 min      percentage (%)

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